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We've tested five HD 5770s from the leading manufacturers against each other to see which hits the price/performance sweetspot when it comes to mid-range and high-end gaming. We also cranked the settings up (HDR, Anti-Aliasing, reflections etc) even at middling resolutions, to see just how capable these cards really are.

It's perfectly reasonable to say that, out of the five 5770's we pitted against each other using the same benchmarks, the Gigabyte Super Overclock is the winner in performance terms.

But to call it a clear winner is something of a stretch. The mid-range Juniper GPU is only really capable of so much throughput, and there's the 5770's middling memory bandwidth to take into account as well.

In performance terms, the Super Overclock makes its mark at the high end. That extra 50MHz on the GPU creeps it past its competitors to score two frames per second higher than the next best card, and a whole four FPS higher than lowest performer in DiRT 2 at 1920 x 1080.

Likewise, testing with Heaven 2.1's Tesselation options sees a performance gain, but only by a hairline 0.1 FPS. That's an enormous performance differential in nobody's book, and the margin narrows as you crank down the resolution.

And the price you pay for a few more frames per second? Around a £15 premium over stock 5770s. It's not a great amount of money – but then, it's not a great amount of extra performance, either.

However, it's still a little cheaper than Sapphire's offering, the only card that offers four-screen functionality via EyeFinity, so it's really a question of what you're after. If it's more frames per second, this is the one. But only by the laciest of margins.